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Part of situation: Northwestern University positron trapping experiment (3 clusters)

Northwestern University physicists trap single antimatter particle

antimatter positron Northwestern University quantum physics Standard Model

Physicists at Northwestern University have successfully trapped a single positron—the antimatter counterpart to an electron—for several months. The research, published in Physical Review Letters, demonstrates the ability to control the particle's quantum behavior with high precision.

To prevent the positron from annihilating upon contact with ordinary matter, the team used a combination of electric and magnetic fields to suspend the particle within a near-perfect vacuum. The researchers also cooled the particle to temperatures near absolute zero, reducing its motion enough to allow for delicate measurements. This setup, described as a single-positron quantum cyclotron, allows the particle to behave like an artificial atom with distinct, manipulatable energy levels.

This breakthrough provides a method for conducting highly precise comparisons between matter and antimatter. Such studies aim to test the Standard Model of physics, which predicts a close symmetry between the two. Identifying any discrepancies could help explain a fundamental cosmological mystery: why the visible universe is composed almost entirely of matter rather than an equal mix of matter and antimatter.

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Gerald Gabrielse · Northwestern University · Physical Review Letters

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Físicos prenderam uma fugidia partícula de antimatéria durante meses [zap.aeiou.pt]
Scientists Trapped an Antimatter Particle for Months but Studying It Without Blowing Up the Lab Was a Challenge [pulptastic.com]
Bilim İnsanları Antimaddeyi Aylarca Hapsetmeyi Başardı - Donanım Günlüğü1 [donanimgunlugu.com]
Scientists keep a single antimatter particle trapped for months [knowridge.com]
Scientists trapped antimatter particle for months — but studying it without blowing up lab was a challenge [freerepublic.com]
Physicists Trapped a Single Antimatter Particle for Months. Now Comes the Hard Part [www.zmescience.com]
Scientists trapped antimatter particle for months — but studying it without blowing up lab was a challenge [nypost.com]
Scientists Trapped an Antimatter Particle for Months to Study Its Secrets [www.wired.com]